Mas 20, 2022
TDR i wok wankain olsem radar. Instramen i salim wanpela 'pulse signal' we i go antap hariap i go insait long kebol. Taim em i bungim wanpela 'impedance discontinuity', hap bilong eneji i save go bek.
TDR (Time Domain Reflectometry) i wok wankain olsem radar. Instramen i salim wanpela 'pulse signal' we i go antap hariap i go insait long kebol. Taim em i bungim wanpela 'impedance discontinuity' (olsem wanpela 'break', sot 'circuit', 'joint', o 'termination point'), hap bilong eneji i save go bek. Dispela instramen i save skelim taim namel long 'pulse transmission' na 'reflection return', na wantaim 'signal propagation speed' insait long 'medium', i save skelim longwe bilong 'discontinuity'.
Dispela as tingting i luk isi, tasol sampela bikpela samting i save senisim dispela as tingting long praktis. Spid bilong signal i save go aut long olgeta kain kebol midia (twisted pair i save go aut long 0.6 i go inap 0.7 taim spit bilong lait). Taim bilong 'pulse' i save makim 'spatial resolution' - sotpela taim bilong 'pulse' i min olsem 'resolution' i antap tasol 'maximum measurable distance' i sotpela. Amplitude na polarity bilong signal we i kamap i ken tokim yu sapos yu wok long dil wantaim wanpela open seket (positif rifleksen), sot seket (negativ rifleksen), o 'impedance mismatch' (hap rifleksen).
Long ol 'cable finder' bilong nau, TDR wok i save stap wantaim 'length measurement'. FangService's PK652 series em i wanpela TDR-taip painim — em i no save tokim yu tasol sapos wanpela kebol i save karim pawa, tasol em i save tokim yu tu longpela bilong kebol na wanem hap em i bruk.
Long wok bilong yusim, TDR tes i nidim wanpela arere bilong kebol long stap isi (konektim long instramen), na stet bilong narapela arere i save afektim ol risal bilong mesamen. Sapos narapela sait i op (i no pinis), instramen i lukim wanpela 'open-circuit' refleksen na em inap long skelim olgeta kebol longpela. Sapos ol i pinisim narapela arere wantaim gutpela 'impedance matching', ol i no lukim wanpela 'reflection', na ol i ken skelim tasol longwe bilong pinis bilong en. Sapos narapela arere i sot, ol i lukim sot-seket refleksen, na ol i ken skelim tu longwe bilong en.
TDR em i strongpela tasol em i no inap long popaia. Hia i gat sampela samting we i save kamap taim ol i no kliagut long mining bilong en. Namba wan, sapos i gat planti 'break' insait long wanpela kebol, TDR inap long soim wanpela we i stap klostu tasol — namba wan 'reflected signal' i save haitim ol 'reflection' i kam longwe. Namba tu, sapos wanpela bruk i stap klostu tru long instramen (olsem insait long 1 mita), 'dead zone' taim bilong instramen i no inap long stretim, na dispela i mekim na 'reflection' i no inap long kamap ples klia. Namba tri, ol strongpela 'electromagnetic interference' envairomen i save kamapim nois we i save daunim TDR mesamen ekyuresi.
Na tu, TDR i save skelim longwe bilong lektrikel signal i go aut, na i no longpela bilong en. Sapos ol i bendim wanpela kebol na pulim i go insait long wanpela 'conduit', trupela longpela bilong en bai bikpela moa long 'straight-line distance' we TDR i skelim. Taim yu ripotim ol data bilong tes, em i bikpela samting long luksave sapos namba em i 'longpela bilong lektrik' o 'longpela bilong bodi'.
Bipo long TDR, standet pasin bilong stretim ol hevi bilong ol kebol i bruk em: lukluk long ai → seksen-bai-seksen排查 → verifikasen bilong senis. Dispela rot i wok gut yet long ol sotpela hap na liklik namba bilong ol kebol, tasol long ol longpela hap, planti kebol, na ol wok hait, wok i no gutpela tumas.
TDR teknoloji i save daunim taim bilong stretim hevi long 'aua' i go long 'minit.' Wanpela gutpela enjinia husat i yusim PK652 series inap long painim wanpela bruk insait long wanpela 100-mita kebol insait long sampela minit tasol, tasol ol tumbuna rot i ken opim planti 'junction box' na 排查 seksen bihain long seksen, na dispela i save kisim planti aua o moa yet.
Na tu, TDR em i wanpela rot bilong painimaut sik we i no save bagarapim ol samting — em i no nidim long katim ol kebol o opim ol konekta, na dispela i no inap bagarapim kebol. Dispela em i bikpela samting tru long ol wok hait we ol i pinisim pinis.
TDR em i nambawan teknoloji bilong testim ol kebol bilong pawa, tasol long tes bilong 'fiber optic', wankain tasol em i hatpela teknik moa ol i kolim OTDR (Optical Time Domain Reflectometry). OTDR i save salim ol 'optical pulses' i go insait long 'fiber' na skelim lait we i kamap long painimaut ol 'break', 'splice loss', 'connector loss', na olgeta longpela bilong en.
Stat long TDR i go long OTDR, as tingting bilong kebol tes teknoloji i no senis — tupela i yusim ol 'reflected signals' long 'lukim' wanem samting i wok long kamap insait long kebol. Wanem samting i senis em i 'signal carrier' (elektrikel na optikal) na 'measurement precision' tasol. FangService's 'cable testing line' nau i lukluk long 'electrical cable testing' (PK651/PK652/PK653+/PK659), na i givim ol gutpela rot bilong skelim ol samting bilong wok bilong 'communication' na 'electrical cabling engineering'. Taim ol i wok long yusim 'fiber cabling', ol OTDR-taip prodak bai kamap olsem wanpela bikpela samting bilong helpim dispela lain. View the Cable Test Instruments Collection
Tokim mipela long projek senario na ol samting yu nidim, na mipela bai painim stretpela solusen na givim yu wanpela kwot insait long 24 aua.
Kisim wanpela fri kwotPK651 analog/digital cable finder, PK652 finder with length measurement, PK653+ multi-range finder (100M/300M/400M), PK659 multifunction finder — four series covering the complete needs from basic continuity verification to advanced fault location. High-precision identification, up to 600M length measurement, rapid fault location — designed for installation and maintenance of network, telephone, and electrical cabling systems.
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